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Kernel: Add a LoopbackAdapter for talking to yourself via 127.0.0.1.

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Choosing adapter for transmit is done by adapter_for_route_to(IPv4Address).
This is just hard-coded logic right now but can be expanded to support a
proper routing table.

Also start moving kernel networking code into Kernel/Net/.
This commit is contained in:
Andreas Kling 2019-04-02 15:46:44 +02:00
parent f8a1d2746e
commit 718bea73b3
11 changed files with 95 additions and 25 deletions
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11
Kernel/IPv4Socket.cpp
View file

@ -9,6 +9,7 @@
#include <Kernel/TCP.h>
#include <Kernel/UDP.h>
#include <Kernel/ARP.h>
#include <Kernel/Net/Routing.h>
#include <LibC/errno_numbers.h>
#define IPV4_SOCKET_DEBUG
@ -128,12 +129,6 @@ ssize_t IPv4Socket::sendto(const void* data, size_t data_length, int flags, cons
(void)flags;
if (addr && addr_length != sizeof(sockaddr_in))
return -EINVAL;
// FIXME: Find the adapter some better way!
auto* adapter = NetworkAdapter::from_ipv4_address(IPv4Address(192, 168, 5, 2));
if (!adapter) {
// FIXME: Figure out which error code to return.
ASSERT_NOT_REACHED();
}
if (addr) {
if (addr->sa_family != AF_INET) {
@ -146,6 +141,10 @@ ssize_t IPv4Socket::sendto(const void* data, size_t data_length, int flags, cons
m_destination_port = ntohs(ia.sin_port);
}
auto* adapter = adapter_for_route_to(m_destination_address);
if (!adapter)
return -EHOSTUNREACH;
int rc = allocate_source_port_if_needed();
if (rc < 0)
return rc;